Mark Zuckerberg has surgery after injuring knee during fight trainingMark Zuckerberg has torn one of his anterior cruciate ligaments (ACLs) while training for a fight.
Source: Mark Zuckerberg has surgery after injuring knee during fight training (https://news.sky.com/story/mark-zuckerberg-has-surgery-after-injuring-knee-during-training-for-mixed-martial-arts-fight-13000899)